Sawmill.



' PATBNTED APR; 7, 190a) J; IHLB.

SAWMILL. APPLIOATIQK FILED AUG. 31, 1907.

3 SHEETS-SHEET 1.

u lnnnnnnnnnmn PATENTED APR. 7, 1908. J. mm-

SAWMILL. APPLICATION rmm' AUG. 31. 1901.

3 SHEETS-SHEET 2.

- carrying the annular member may be rotaaway; Fig. 3 is a detail view of the straining JOHN IHLE, OF OHIPPEWA FALLS, WISCONSIN.

SAWMILL.

Specification of Letters Patent.

Patented April 7, 1908.

Application filed August 31, 1907. Serial No. 390,974.

To all whom it may concern:

Be it known that I, JOHN IHLE, a citizen of the United States, residing at Chippewa Falls, in the county of Chippewa and State of Wisconsin, have invented a new and useful Sawmill, of which the following is a specification.

This invention has reference to improvements in saw mills of the band-saw type, and its object is to produce a band-saw carrying wheel or disk wherein the rotating portion of the disk is of comparatively light weight and yet capable of withstanding the strains to which it may be subjected in operation.

The invention comprises a band saw wheel having an annular rotative member supported upon a fixed disk-like member, which latter is adjustable with relation to its support so that the annular member may be set at various distances from another band-saw wheel constitutin the power wheel for the saw. The diskike support comprises a number of radially adjustable segmental members 1 ounted upon a support with relation to which latter the several members are also adjustable as a whole. Furthermore there is provided means whereby the disk tably adjusted so that the annular member. can be set into various relations with the power band saw wheel by the rotative movement of thedisk.

The invention also consists in other features which will be set forth in the following description, reference being therein had to the accompanying drawings forming part of this specification, in which,'

Figure 1 is an elevation of a saw mill embodying my invention, non-essential arts being omitted Fig. 2 is a side view 0 the structure shown in Fig. 1, with parts broken device used in connection with the lower saw disks; Fig. 4 is a central section through one of the improved saw-carrying disks; Fig. 5 is a side view of the same with the carrying shaft in section.

Referring to the drawings, the main column of the saw mill is shown at 1 and this column is provided with a base plate which rests upon the floor 2, while a portion of the mill projects below the flooring when the mill is set up for use. The column 1 is offset to one side, as shown at 3, and there carries a shaft 4 on one end ofwhich is a wheel 5 constituting the upper supporting wheel for a 1 band-saw 6. The shaft 4 is mounted in j ournal bearings 7 formed on a yoke 8, which, in turn, is pivoted as shown at 91 in a fork 92 pivotally supported, as indicated at 93, in a sliding block 9 mounted in vertical wa s in a frame 10, the construction being'suc that the fork 92 together with the yoke 8 may turn with the pivot 93 on a vertical axis. The end of the yoke 8 remote from the pivot pin 91 is supported upon an adjusting screw 94 movable in an arm 95 fast on the fork 92, so that the yoke 8 together with the shaft 4 and wheel 5 may be adjusted about a horizontal axis after the manner of tilting mechanism employed in band-saw mills. For the cross-line adjustment there is provided a hand-wheel 96 engaging blocks 97 mounted in brackets 98 fast on the block 9, so that the yoke 8 together with the shaft 4 and wheel 5 may be adjusted about the vertical axis of the pivot 93.

Formed on the upper face of the offset 3 of the standard 1 are two parallel uprights 11 spaced apart sufliciently to receive the frame 10 in ways formed' in the uprights 11. The

frame 10 is supported on the upper end of a screw-rod 12 guided in the offset 8 and receiving anut 13, the outer face of which may be formed as a worm. wheel and is engaged by a worm 14 controlled by a hand wheel 15.

By this last-named means the frame 10 may be adjusted vertically as desired.

Fast on the frame 10 is a knife-edge support 16 and fast on the slidin member 9 is another knife-edge 17 dis lace with relation and in opposition to the nife-edge 16.' Cooperating with these knife-edges 16 and 17 is a lever 18 carrying at its outer end weights 19 and held to one of the uprights 11 by a guide rod 20. The tendency of the weights 19 is to move the sliding member 9 and with it the band wheel 5 in an upward direction.

Directly below the band wheel 5 is another wheel 21 around which passes the saw 6', and this wheel is mounted on a shaft 22 which, in turn, is mounted in suitable journal bearings 23dformed in the lower portion of the standar 1.

\Vhen a saw 6 is placed upon the two band wheels 5 and 21 the initial strain is effected by roper manipulation of the hand wheel 15 to lift the band wheel 5 and the working strain is ap lied by means of the weights 19.

The ban -saw 6 passes through a table 24 mounted upon the frame 1 and capable of oscillation about a central point 25 by means of a slotted arm 26 and set-screw 27, so that any lumber fed across the table 24 will either be presented to the saw '6 so that the cut is strictly at right angles to the table 24 or this table may be set at any an may be of corres onding ang e. In practice suitable feed roll s for rip sawing or for resawing may be employed, but these have been omitted from the drawings since such as are commonly employed for the purpose may be used.

In the drawings the band-saw supporting wheels 5 and 21 are shown as solid wheels but it will be understood that they may be s oked wheels if so desired, and in the case of large mills these band-saw wheels may be replaced by the type of band wheel shown in Figs. 4 and 5 and to which reference will hereinafter be made.

The shaft 22 carries a pulley 28 over which passes a belt 29 coming from another pulley 30 mounted on a shaft 31 driven by any suitable power means.

Formed in the upper face of the standard 1 are horizontal guideways 32, planed true as is also the top of the standard 1, and .on this standard is a supplemental standard 33 having a tongue 34 contained in the guideways 32. The standard 33 is capable of moving in the guideways 32, and an adjusting screw 35 carrying a hand wheel 36 is provided for this purpose. On the upper face 'of the supplemental standard 33 are formed journal boxes 37 for ashaft 38 on one end of which, beyond one of the journal boxes 37, is a pulley 39 over which passes a belt 40 extending downward through the floor to a power pulley 41 mounted on a power shaft'42 receiving motion from any suitable source. In order to save space the belt is confined between two ulleys 43 journaled upon studs formed on fix rackets 44 extending from the supplemental standard 33, and the belt 40 is enby belt-tightening pulleys 45 on one a belt-tightener rod 46 under the control of suitable mechanism, not shown, since the belt-tightener may be of any ordinary construction.

Upon the end of the shaft 38 remote from the pulley 39 is a stepped band wheel 47 having a number of bearing faces 48 of different diameter and, if desired, of the same Width after the manner of an ordinary stepped cone pulley. The band wheel 47 constitutes the upper supportin band wheel for a number of band-saws 49 o y one of which, however, is shown in the drawings, and since when a number of saws are used they will be placed upon the different bearing faces 48 of the band wheel 47 the edges of these saws will be dis laced with reference to each other by the radial differences of the faces 48. If, for instance, the radial differences of these faces is one inch, then when a band-saw 49 is upon the face located the greatest distance from lo and the cut the second face by two inches, and on the third face by three inches. Or any other relation of these faces may be employed, as will be readily understood.

The lower supports for the band-saws 49 are constructed as best shown in Figs. 4 and 5. In these figures there is shown a shaft 50 which is so mounted as to be held a ainst rotation. This shaft 50 is embraced y clamp members 51 held together by bolts 52. clamp members 51 have tongues engaging in guide-ways 53 in two blocks 54, parallel with h other and spaced apart sufficiently to p 51. These blocks carry on the faces remote from those faces having the guide-ways 53 pins 55 entering segmental blocks 56, the outer edges of which are curved on a radius of which the. axis of the shaft 50 is the center. The ends of each block 54 also carry pins 57 entering other segmental blocks 58 having outer faces curved on an arc of which the axis of the shaft 50 is the center. -The blocks 56 and 58 are arranged at right angles to each other and are disconnected one from the other so that by means of the screws 59 engaging the blocks 54 and also en aging the respective blocks 56 and 58 these bTocks may be adjusted radially outward from the shaft 50. Fast to the nected to the inner flange by a web 66.

in order that undue friction may not be created-at this point the bearing faces may be made of Babbitt metal or roller or ball-bearings may be introduced, but these being the clamp 51 the stationary member composed of the arts 56 and 58, which for convenience I wil? term the adjustable disk, may be displaced with relation to the shaft 50 by loosening the clamp 51 and moving the blocks 54 to oneside or the other with relation to the shaft 50, after which the bolts 52 may be turned and the adjusting disk will then be eccentric to the shaft 50 to the desired extent. The result is that the annular rotatable member 64 will then run eccentric to the shaft 50.

Since the annular member 64 rotates upon the stationary disk thebearing surfaces are,

. tion without looseness and of course, subjected'to wear, and this wear is readily taken up from time to time by an appropriate movement of the screws 59 so that the parts may be maintained in proper relaat the same time without being too tight for easy running.

In the structure shown in Fig. 2 there are provided two .disks having annular rotating members 64, and these are made of suflicient width to each accommodate a saw upon either of two adjacent faces 48 of the wheel 47. If it be desired to run as many saws in the gang as the wheel 47 will accommodate, then there will be provided as many annular rotatable members 64 as may be necessary.

The shaft is fixed at one end to a block 67 which in turn, is mounted to slide vertically in ways in a frame 68, and this frame 68 is also mounted to slide vertically in two spaced standards 69 rising from a base block 70 having a tongue ways 72 formed on a fixed portion of the structure. Fast on the block 67 is a knifeedge bearing 73 and fast on the frame 68 is another knife-edge bearing 74 displaced with relation to the knife-edge bearing 7 3 and engaged by a lever 75 carrying weights 76 and held to the block 68 by a guide strap 77. The frame 68 is under the control of an adjusting screw 78 provided with a manipulating hand wheel 79 and passing through a nut formed in a bridge piece 80 connecting the upper ends of the standards 69. By means of the screw 78, the shaft 50 and the band wheels 64 carried thereby may be put under initial strain to take up the slack in the saws 49, while the working strain is put upon these band wheels and the saws carried by them by the weights 76. However, since the .band-saws are of different lengths and the space in the wheel 47 allows greater slack in the saws than could be conveniently taken up by the screw 78, the adjusting disk's carrying the annular rotatable members 64 are now brought into play, and these disks can be so adjusted with relation to the shaft 50 as to take up the slack in the saws 49 without throwing the saws out of true.

In order to fix the adjusting disks against rotation and to bring the strain off the shaft 50, curved slotted arms 81 are pivotally secured to the blocks 58 and bolts 82 passing through slots 83 in said arms and carried by an upright 84 fast on the blocks serve to hold the adjusting disk in fixed relation to the fixed portions of the structure.

Let it be assumed that the saw 6 has afixed position. Then by adjusting the supplemental standard 33 and the block 70 in a direction toward the active cutting edge of the saw 6 the width of cut between the saws 6 and 49 may be readily fixed. By this means two cuts may be made at the same time, one between the saw 6 and the usual limiting 71 arranged to slide in rolls on the table and the other between the saw 6 and the saw 49, and if more than one saw 49 is used then still additional cuts may be made, all by passing the lumber through the mill but once.

When the saws 49 are adjusted laterally as described, the belt-tightener 46 is moved to the proper position to loosen the belt 40 so that the adjustments may be effected, after which the belt 40 may be tightened in the usual manner.

Now, let it be assumed that it is desirable to rip a board at an angle or bevel. This may be done by either setting the table 24 at an angle or adjusting the upper and lower supports for the saws 49 in opposite directions. When beveled cribbing is to be sawed, then two saws may be used with the upper wheel 47 adjusted in one direction and the lower disks and annular supports 64 adjusted in the other direction. ience, the wheels 5 and 21 may be called the upper and lower stationary saw-supporting wheels respectively, while the wheels 47 and 64 may be called the upper and lower auxiliary band-saw wheels respectively.

The band-saws 49 may be .run through guides 85 mounted on the ends of brackets 86 fast on the supplemental standard 33.

The cone band wheel 47 overhangs the corresponding shaft bearing .37 to a considerable extent, and in order that the heavy strain upon this wheel may be neutralized there are provided supporting rollers 87 journaled on studs projecting from brackets 88 fast on the supplemental standard 33 and serving to uphold the band wheel 47, these rollers engaging-the face 48 of greatest diameter. The rollers 87 are preferably made of indurated fiber, or they may be made of any other suitable material. The lower stationary band wheel 21 may likewise be supported in the line of greatest strain by other rollers 89 mounted on brackets 90 on the main standard 1.

It'will be understood that the cross-line and tilting mechanisms may be applied to the disks 64, but since the principle of the operation of these mechanisms is well known it is not deemed necessary to show these particular mechanisms in the drawings. 1

In the foregoing description mention is made of the table 24 and this table is shown as adjustable about a horizontal axis. The showing of, his table is largely illustrative and is not designed to be taken as showing a form that must be adoptedwith the present machine. The table will in practice be provided with res'aw feed rollers and also with rip-saw feed rollers. The re-saw feed rollers may be similar to those ordinarily employed in bandsaw mills, and, therefore, need not be illustrated, and it is designed to use a crane for the purpose of placing or removing the re-saw table and the rip-saw table when.

For convenso desired instead of, as is commonly the case, having the re-saw table hinged to the main table so as to be turned out of the Way, although a resaw table may be used With my invention when attached directly to the main table by hinge connections.

I claim z- 1. In a machine of the character described, a band-saw Wheel or drum comprising an annular rotatable member, a disk carrying said annular member and normally fixed against rotation, a shaft for said disk, means for permitting adjustmentof the disk radially with reference to the shaft and for holding the disk in adjusted positions, and means for permitting adjustment of the disk rotatively With reference to said shaft and for holding it in such adjusted positions.

2. In a machine of the character described, a band-saw wheel or drum, comprisingan annular rotative member, a disk carrying said annular member and fixed against rotation, a shaft for said disk, and means for adjusting the disk radially With reference to the shaft.

3. In a machine of the character described, a band-saw Wheel or drum comprising an annular rotative member for carrying the saw, and a disk fixed against rotation and carrying the annular member, said disk being composed of parts positively adjustable radially to take up Wear.

, jecting beyond the'same, and an 4. In a machine of the character described, a band-saw Wheel or drum, comprismg an annular rotatlve member, a dlsk fixed against rotation, a shaft upon Which said' for positively in- 5. In a machine of the character described, a band-saw Wheel or support conf- -prising a fixed shaft, a clamp thereon, blocks movable With relation to said clamp, other blocks radially adjustable With relation to the shaft and carried by the first-named blocks, said last-named blocks having their outer edges curved on arcs struck from the axis of the shaft as the center, cheek plates carried by said last-named blocks and proannular rotatable member having its periphery formed to receive a band-saw and its inner edge formed to seat between the cheek plates.

5 In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

JOHN IHLE.

Witnesses:

W. F. HORN, D. G. HALL. 

